We will use this icon to mark check points. A check point is a way for you to check how you are doing.

For most of the steps in this tutorial we will provide the code as it should look after the task. It is tempting, we know, but please, please, do not go for the “copy&paste” way.

We will use this icon to challenge you with additional code-related tasks so you can go further at your own pace. No inline answer will be provide for those challenges but we will give you some guidelines and tips. By the way, within the instructions we will use an italic font to refer to variables and pieces of code.

We will use this icon to ask you some questions related to the task your are working on.

Additional info and resources - this is not essential to complete the tutorial, but very interesting.

Tips that might help you on this task.

If you are following this tutorial as part of a workshop, do not hesitate to raise your hand and share any questions or comments you may have. If you are doing it by your own, you still can raise your hand in our mailing list, just join our Google Group.